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FC loader: preset waveforms, vibrato and stuff

This commit is contained in:
tildearrow 2022-08-15 03:18:54 -05:00
parent 15b4294532
commit 4663534fa3
1 changed files with 175 additions and 14 deletions
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189
src/engine/fileOps.cpp
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@ -2262,6 +2262,95 @@ bool DivEngine::loadMod(unsigned char* file, size_t len) {
return success;
}
unsigned char fcXORTriangle[32]={
0xc0, 0xc0, 0xd0, 0xd8, 0xe0, 0xe8, 0xf0, 0xf8, 0x00, 0xf8, 0xf0, 0xe8, 0xe0, 0xd8, 0xd0, 0xc8,
0xc0, 0xb8, 0xb0, 0xa8, 0xa0, 0x98, 0x90, 0x88, 0x80, 0x88, 0x90, 0x98, 0xa0, 0xa8, 0xb0, 0xb8
};
unsigned char fcCustom1[32]={
0x45, 0x45, 0x79, 0x7d, 0x7a, 0x77, 0x70, 0x66, 0x61, 0x58, 0x53, 0x4d, 0x2c, 0x20, 0x18, 0x12,
0x04, 0xdb, 0xd3, 0xcd, 0xc6, 0xbc, 0xb5, 0xae, 0xa8, 0xa3, 0x9d, 0x99, 0x93, 0x8e, 0x8b, 0x8a
};
unsigned char fcCustom2[32]={
0x45, 0x45, 0x79, 0x7d, 0x7a, 0x77, 0x70, 0x66, 0x5b, 0x4b, 0x43, 0x37, 0x2c, 0x20, 0x18, 0x12,
0x04, 0xf8, 0xe8, 0xdb, 0xcf, 0xc6, 0xbe, 0xb0, 0xa8, 0xa4, 0x9e, 0x9a, 0x95, 0x94, 0x8d, 0x83
};
unsigned char fcTinyTriangle[16]={
0x00, 0x00, 0x40, 0x60, 0x7f, 0x60, 0x40, 0x20, 0x00, 0xe0, 0xc0, 0xa0, 0x80, 0xa0, 0xc0, 0xe0
};
void generateFCPresetWave(int index, DivWavetable* wave) {
wave->max=255;
wave->len=32;
switch (index) {
case 0x00: case 0x01: case 0x02: case 0x03:
case 0x04: case 0x05: case 0x06: case 0x07:
case 0x08: case 0x09: case 0x0a: case 0x0b:
case 0x0c: case 0x0d: case 0x0e: case 0x0f:
// XOR triangle
for (int i=0; i<32; i++) {
wave->data[i]=(unsigned char)((fcXORTriangle[i]^0x80)^(((index+15)<i)?0x87:0x00));
}
break;
case 0x10: case 0x11: case 0x12: case 0x13:
case 0x14: case 0x15: case 0x16: case 0x17:
case 0x18: case 0x19: case 0x1a: case 0x1b:
case 0x1c: case 0x1d: case 0x1e: case 0x1f:
// pulse
for (int i=0; i<32; i++) {
wave->data[i]=(index>i)?0x01:0xff;
}
break;
case 0x20: case 0x21: case 0x22: case 0x23:
case 0x24: case 0x25: case 0x26: case 0x27:
// tiny pulse
for (int i=0; i<32; i++) {
wave->data[i]=((index-0x18)>(i&15))?0x01:0xff;
}
break;
case 0x28:
case 0x2e:
// saw
for (int i=0; i<32; i++) {
wave->data[i]=i<<3;
}
break;
case 0x29:
case 0x2f:
// tiny saw
for (int i=0; i<32; i++) {
wave->data[i]=(i<<4)&0xff;
}
break;
case 0x2a:
// custom 1
for (int i=0; i<32; i++) {
wave->data[i]=fcCustom1[i]^0x80;
}
break;
case 0x2b:
// custom 2
for (int i=0; i<32; i++) {
wave->data[i]=fcCustom2[i]^0x80;
}
break;
case 0x2c: case 0x2d:
// tiny triangle
for (int i=0; i<32; i++) {
wave->data[i]=fcTinyTriangle[i&15]^0x80;
}
break;
default:
for (int i=0; i<32; i++) {
wave->data[i]=i;
}
break;
}
}
bool DivEngine::loadFC(unsigned char* file, size_t len) {
struct InvalidHeaderException {};
bool success=false;
@ -2301,10 +2390,11 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
DivSong ds;
ds.tuning=436.0;
ds.version=DIV_VERSION_FC;
//ds.linearPitch=0;
ds.linearPitch=0;
ds.pitchMacroIsLinear=false;
//ds.noSlidesOnFirstTick=true;
//ds.rowResetsArpPos=true;
//ds.ignoreJumpAtEnd=false;
ds.ignoreJumpAtEnd=false;
// load here
if (!reader.seek(0,SEEK_SET)) {
@ -2521,12 +2611,16 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
delete[] waveArray;
} else {
logV("empty wave %d",i);
w->len=32;
for (int i=0; i<32; i++) {
w->data[i]=(i*255)/31;
}
generateFCPresetWave(i,w);
}
ds.wave.push_back(w);
}
} else {
// generate preset waves
for (int i=0; i<48; i++) {
DivWavetable* w=new DivWavetable;
generateFCPresetWave(i,w);
ds.wave.push_back(w);
}
}
@ -2542,6 +2636,14 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
ds.subsong[0]->speed1=3;
ds.subsong[0]->speed2=3;
int lastIns[4];
int lastNote[4];
signed char lastTranspose[4];
memset(lastIns,-1,4*sizeof(int));
memset(lastNote,-1,4*sizeof(int));
memset(lastTranspose,0,4);
for (unsigned int i=0; i<seqLen; i++) {
for (int j=0; j<4; j++) {
ds.subsong[0]->orders.ord[j][i]=i;
@ -2559,6 +2661,7 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
for (int k=0; k<32; k++) {
FCPattern& fp=pat[seq[i].pat[j]];
if (fp.note[k]>0 && fp.note[k]<0x49) {
lastNote[j]=fp.note[k];
short note=(fp.note[k]+seq[i].transpose[j])%12;
short octave=2+((fp.note[k]+seq[i].transpose[j])/12);
if (fp.note[k]>=0x3d) octave-=6;
@ -2574,6 +2677,27 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
p->data[k][4]=2;
p->data[k][5]=0;
}
} else if (fp.note[k]==0x49) {
if (k>0) {
p->data[k-1][4]=0x0d;
p->data[k-1][5]=0;
}
} else if (k==0 && lastTranspose[j]!=seq[i].transpose[j]) {
p->data[0][2]=lastIns[j];
p->data[0][4]=0x03;
p->data[0][5]=0xff;
lastTranspose[j]=seq[i].transpose[j];
short note=(lastNote[j]+seq[i].transpose[j])%12;
short octave=2+((lastNote[j]+seq[i].transpose[j])/12);
if (lastNote[j]>=0x3d) octave-=6;
if (note==0) {
note=12;
octave--;
}
octave&=0xff;
p->data[k][0]=note;
p->data[k][1]=octave;
}
if (fp.val[k]) {
if (ignoreNext) {
@ -2602,10 +2726,12 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
}
} else {
p->data[k][2]=(fp.val[k]+seq[i].offsetIns[j])&0x3f;
lastIns[j]=p->data[k][2];
}
}
} else if (fp.note[k]>0) {
} else if (fp.note[k]>0 && fp.note[k]<0x49) {
p->data[k][2]=seq[i].offsetIns[j];
lastIns[j]=p->data[k][2];
}
}
}
@ -2619,11 +2745,11 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
ins->type=DIV_INS_AMIGA;
ins->name=fmt::sprintf("Instrument %d",i);
ins->amiga.useWave=true;
//unsigned char seqSpeed=m.val[0];
unsigned char seqSpeed=m.val[0];
unsigned char freqMacro=m.val[1];
//unsigned char vibSpeed=m.val[2];
//unsigned char vibDepth=m.val[3];
//unsigned char vibDelay=m.val[4];
unsigned char vibSpeed=m.val[2];
unsigned char vibDepth=m.val[3];
unsigned char vibDelay=m.val[4];
unsigned char lastVal=m.val[5];
@ -2633,6 +2759,9 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
signed char loopMapFreq[64];
memset(loopMapFreq,-1,64);
signed char loopMapWave[64];
memset(loopMapWave,-1,64);
// volume sequence
ins->std.volMacro.len=0;
for (int j=5; j<64; j++) {
@ -2672,9 +2801,13 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
if (++ins->std.volMacro.len>=128) break;
}
} else {
ins->std.volMacro.val[ins->std.volMacro.len]=m.val[j];
lastVal=m.val[j];
if (++ins->std.volMacro.len>=128) break;
// TODO: replace with upcoming macro speed
for (int k=0; k<MAX(1,seqSpeed); k++) {
ins->std.volMacro.val[ins->std.volMacro.len]=m.val[j];
lastVal=m.val[j];
if (++ins->std.volMacro.len>=128) break;
}
if (ins->std.volMacro.len>=128) break;
}
}
@ -2685,6 +2818,7 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
FCMacro& fm=freqMacros[freqMacro];
for (int j=0; j<64; j++) {
loopMapFreq[j]=ins->std.arpMacro.len;
loopMapWave[j]=ins->std.waveMacro.len;
if (fm.val[j]==0xe1) {
if (ins->std.arpMacro.mode) {
ins->std.arpMacro.loop=(signed int)ins->std.arpMacro.len-1;
@ -2707,6 +2841,7 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
} else if (fm.val[j]==0xe0) {
if (++j>=64) break;
ins->std.arpMacro.loop=loopMapFreq[fm.val[j]&63];
ins->std.waveMacro.loop=loopMapWave[fm.val[j]&63];
break;
} else if (fm.val[j]==0xe3) {
logV("unhandled vibrato!");
@ -2735,6 +2870,32 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
}
}
// vibrato
for (int j=0; j<=vibDelay; j++) {
ins->std.pitchMacro.val[ins->std.pitchMacro.len]=0;
if (++ins->std.pitchMacro.len>=128) break;
}
int vibPos=0;
ins->std.pitchMacro.loop=ins->std.pitchMacro.len;
do {
vibPos+=vibSpeed;
if (vibPos>vibDepth) vibPos=vibDepth;
ins->std.pitchMacro.val[ins->std.pitchMacro.len]=vibPos*4;
if (++ins->std.pitchMacro.len>=128) break;
} while (vibPos<vibDepth);
do {
vibPos-=vibSpeed;
if (vibPos<-vibDepth) vibPos=-vibDepth;
ins->std.pitchMacro.val[ins->std.pitchMacro.len]=vibPos*4;
if (++ins->std.pitchMacro.len>=128) break;
} while (vibPos>-vibDepth);
do {
vibPos+=vibSpeed;
if (vibPos>0) vibPos=0;
ins->std.pitchMacro.val[ins->std.pitchMacro.len]=vibPos*4;
if (++ins->std.pitchMacro.len>=128) break;
} while (vibPos<0);
ds.ins.push_back(ins);
}
ds.insLen=(int)ds.ins.size();